不同外网等值模型对EMS应用效果影响的试验研究

A Test Investigation on Effect of Different External Network Equivalent Models on EMS Applications

利用广东省调实时外网等值自动生成系统为深圳地调生成了几种外网等值模型：外网简单挂等值机模型、外网直接等值模型、缓冲网等值模型和详细外网模型。通过远程网将等值模型送到深圳地调,在深圳地调现有能量管理系统上进行了几种主要开合环操作的仿真计算,并和现场实际操作的测试结果进行了比较,评估了应用不同外网等值模型时开断潮流的计算精度。结果表明,缓冲网等值模型具有与详细外网模型一致的精度,是最佳的外网等值建模方式。

Four external network equivalent models for Shenzhen power dispatching center are generated by use of Guangdong provincial real-time external network equivalence system, including the only equivalent machine model, the conventional Ward equivalent model, the buffer-net equivalent model and the unreduced external network model. These models are separately sent to Shenzhen power dispatching center for EMS application via WAN. Some main open/close loop operation tests are simulated by EMS equipped in Shenzhen power dispatching center and the simulation results are compared with testing results of practical on-site operations. The calculation accuracies of breaking power flow under different external network equivalent models are evaluated and the results show that the buffer-net equivalent model performs a rather consistent accuracy with the unreduced external network model, and it is the best external network equivalent model.